1021421004 has 48 divisors (see below), whose sum is σ = 2401660800. Its totient is φ = 337864576.

The previous prime is 1021421003. The next prime is 1021421083. The reversal of 1021421004 is 4001241201.

It is not an unprimeable number, because it can be changed into a prime (1021421003) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1549627 + ... + 1550285.

It is an arithmetic number, because the mean of its divisors is an integer number (50034600).

Almost surely, 2^1021421004 is an apocalyptic number.

It is an amenable number.

1021421004 is an abundant number, since it is smaller than the sum of its proper divisors (1380239796).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1021421004 is a wasteful number, since it uses less digits than its factorization.

1021421004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1462 (or 1460 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 1021421004 is about 31959.6777831066. The cubic root of 1021421004 is about 1007.0899484993.

Adding to 1021421004 its reverse (4001241201), we get a palindrome (5022662205).

The spelling of 1021421004 in words is "one billion, twenty-one million, four hundred twenty-one thousand, four".